Cat Asthma: What Causes It and How to Treat It

Author: Dr. Beth Turner

Published: July 3, 2022

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cat breathing through their nose

Often in life, experience is the best teacher.

To understand what your cat may be experiencing when they have asthma, it may be helpful to "walk a mile in their paws."

So, to give you insight into what an asthma attack may feel like to your cat, I want you to try an activity.

For this activity, you will need a plastic straw and, if available, a coffee stirrer.

  1. Run in place for 30 seconds, then stop and assess how you feel – focus on how you're breathing.

  2. Get your straw. Run in place for 30 seconds while holding your nose and breathing through the straw. Stop and assess how it feels breathing through the straw.

  3. Get your coffee stirrer. Run in place for 30 seconds while holding your nose and breathing through the stirrer. Stop and assess how it feels breathing through the stirrer.

The part where you breathe through the straws is similar to what it feels like to have an asthma attack. For your cat, it feels impossible to get oxygen into their lungs. The big difference is that they don't understand why, so it's even more stressful for them.

To truly help your cat, it is important to understand what asthma is, how to recognize the symptoms, and what you can do to help protect your cat from having frequent and severe attacks.

What Is Asthma and What Causes It in Cats?

To put it simply, asthma (more appropriately called feline allergic bronchitis, or FAB) is a respiratory condition of the lower airways of the lungs caused by an allergic reaction, other forms of hypersensitivity, and even stress. But unfortunately, it is more complicated than it sounds.

To help you understand asthma more specifically, you need to know the definition of a couple of words:

Antigen: A foreign substance or toxin that the immune system perceives as a threat.

Allergens: This is an antigen the immune system fights off since it is a perceived threat.

Antibodies: A protein the immune system produces to neutralize foreign invaders (antigens).

Your cat's body has developed specific antibodies to target allergens they inhale. When there has been repeated exposure to the allergen(s), a cascade of events begins when the antibodies recognize the allergen(s).

  1. Several different types of immune cells are brought to the airway.
  2. The immune cells spark the production of substances that cause inflammation.
  3. The inflammation causes the airways to become irritated, swell, and constrict.
  4. The airways become narrowed and accumulate mucus.
  5. Air movement is then limited through the airways making breathing difficult.
  6. The end result is an asthma attack.

Between 1–5% of cats are affected by asthma, with the average age of diagnosis between 4 and 5 years. Gender and breed do not appear to affect susceptibility. However, there are some studies that indicate, but nothing has been proven, that Siamese Himalayan cats may be predisposed to asthma.

siamese himalayan cat that suffers from asthma

What Are the Symptoms of Asthma and an Asthma Attack?

It is important to recognize when your cat has asthma, especially if they are experiencing an asthma attack. Because cats panic and become stressed when they can't breathe, the symptoms can progress quickly.

Very often, cats extend their neck to make it easier for them to breathe and they get into a hunched position close to the ground. It resembles when they are trying to get out a hairball. They may also be coughing and wheezing.

During a full-fledged attack, your cat's sides may move in and out quickly as they attempt to breathe. They may drool or cough up mucus as well.

If your cat is having any breathing issues or they are taking more than 40 breaths per minute (normal is 24 to 30 bpm) while resting or sleeping, seek veterinary care immediately. If no action is taken, the situation can progress rapidly and become fatal.

Common symptoms of asthma that you may notice:

  • Rapid or difficulty breathing
  • Increased effort to breathe
  • Open mouth breathing (resembles panting, but worse – mouth is wide open, and tongue is stiffer)
  • Wheezing
  • Continuous coughing
  • Gagging
  • Swallowing frequently
  • Gurgling sounds from the throat
  • Production of foamy mucus when coughing
  • Bluish lips and gums
  • Weakness and lethargy

These two videos show early, mild symptoms. But if treatment isn't provided, these attacks can become bad. The second video below shows how the neck becomes extended during an asthma attack.



What Triggers Asthma in Cats?

Certain triggers can cause your cat to suffer an asthma attack. Awareness of and avoiding your cat's particular trigger(s) helps decrease the number of episodes they may have.

Some potential triggers include:

  • Dust, especially from cat litter (see our list of better litter options below)
  • Dust mites
  • Pollen
  • Grass and weeds
  • Smoke (cigarettes, fireplace, candles)
  • Mold and mildew
  • Household cleaning products
  • Aerosol sprays
  • Air fresheners
  • Fabric softeners
  • Perfumes
  • Carpet powders
  • Certain foods (like corn, soy, beef, fish)

Veterinarian offering treats in hand to orange cat while holding stethoscope

How Is Cat Asthma and FAB Diagnosed?

Unfortunately, there isn't a single test that can be done to simply diagnose feline asthma.

Often the diagnosis requires ruling out other diseases that can cause respiratory symptoms. Such conditions include heart disease, infectious pneumonia (bacterial, fungal, or parasitic), feline heartworm disease, lungworms, and cancer (either primary or metastatic).

Because the list of "other potential causes" is extensive, multiple diagnostic tests are necessary, in addition to a complete physical exam. The tests are used to evaluate your cat's general health as well as provide a possible indication of the underlying cause.

Tests may include:

  • Complete blood count (CBC): This test identifies elevations in certain cell types that can indicate infection, allergic events, or parasites.
  • Blood chemistries: Evaluates general organ function and blood protein levels.
  • Fecal exams: Poop samples identify if any parasites are present.
  • Urinalysis: Identifies urinary tract infections, kidney issues, and other possible medical conditions.
  • Blood pressure check: Evaluates for high blood pressure.
  • Heartworm test: Evaluates for the presence of heartworms, which is a condition that targets the lungs.
  • Chest radiographs: X-rays show changes in the lungs and heart.
  • Echocardiogram: Evaluates the heart.
  • Bronchoscopy: A visual evaluation of the airways via a flexible scope placed down a cat's throat and done under anesthesia.
  • Bronchoalveolar lavage: Evaluates mucus from the smaller airways. Done under anesthesia, sterile saline is flushed into the throat, and then samples are taken, looking for microorganisms that can be cultured and white blood cells associated with different medical issues.

Based on the findings during the physical exam and the results of the diagnostic tests, your veterinarian can determine the likely cause of the respiratory symptoms. However, in some cases, a single cause may not be able to be determined. If all other causes are ruled out, your cat will be given the presumptive diagnosis of asthma.

Also, having your cat allergy-tested can help you determine what environmental or seasonal issues may be triggering attacks. Some common ones are dust, pollen, dust mites, and grasses.

cat getting asthma treatment with an inhaler and chamber deviceWhat Is the Treatment for Asthma in Cats?

For most cases, cats are treated at home. However, if your cat is in severe respiratory distress, they will need to be hospitalized for oxygen therapy and/or intravenous medications until they are stable enough to be managed at home.

Successful treatment and management are viewed as a decrease in the frequency and severity of the attacks. It is often a combination of several treatment types. It typically includes a combination of the following:

  • Bronchodilators: Inhalers used to dilate or open the airways. Using an aerosol chamber made for cats, like the one in the photo, helps administer the exact dose. It's truly a life saver. Watch this video to learn how to use it and ensure your cat is inhaling enough times to get the full dose.

  • Corticosteroids: Pills given on a regular basis to help decrease inflammation in the lungs.

  • Hypoallergenic diet: Prescription food can eliminate possible food triggers.

  • Immunotherapy: Helps stimulate the immune system to attack allergens. Immunotherapy can be given by oral drops under the tongue or shots. Either can be done at home or at the vet's office. It can take between 18 and 24 months to determine if it is working and providing full relief. However, you may see some relief at 3 to 6 months. It generally has a success rate of 85%–90% in improving symptoms.

  • Medical acupuncture: It will depend on how bad your cat is, but a session is about 2 to 30 minutes long, and a minimum of 3 to 10 sessions is needed 1 to 2 weeks apart. It can help decrease inflammation, boost the immune system, and helps with muscle spasms.

  • Chiropractic adjustments: When there are disturbances to the nervous system, especially those affecting the thoracic nerves, chiropractic care helps increase chest expansion and flexibility. It also helps with overall emotional well-being and stress levels, as stress is a trigger for asthma.

  • Omega 3 fatty acids: A natural anti-inflammatory, which can be given as a fish oil supplement. These are a few of our favorite, high-quality brands: Omega Benefits, Nutramax Welactin, and Nordic Naturals.
  • Avoidance of triggers

Ways to Reduce Asthma Attacks

Even though there is no “cure” for asthma, cats can lead normal and active lives with proper management and supportive treatment.

Carefully monitoring and documenting the details (time, date, severity, and treatment) when your cat has an attack helps you determine what potential triggers are so that you can take steps to avoid them in the future. And it helps keep track of their progress.

An allergy test can help identify what environmental or seasonal triggers are causing your cat's asthma attacks. To help with managing environmental triggers, in addition to possible immunotherapy (allergy shots), you can implement one or more of the following:

  • Use air conditioning air filters that are designed to decrease airborne allergens.
  • Vacuum and dust daily to decrease dust and dust mites.
  • Use dust mite covers wherever possible (pillows, beds, pet beds, etc.).
  • Use air purifiers with HEPA filters. PureZone and Koios are two good options.
  • Keep windows shut and your cat indoors.
  • Don't use aerosols, air or carpets fresheners.
  • Avoid all types of smoke (cigarettes, candles, fireplaces, etc.) around your cat.

Reduce Stress for Your Cat

As mentioned, stress can aggravate your cat's asthma. Taking steps to help your cat remain calm as much as possible is important in managing asthma. The following are a few options:

  • Provide calming treats such as VetriScience Composure Treats, NutraMax Solliquin Behavioral Supplements, or Vetoquinol Zylkene. You can try putting up to 4 drops of Rescue Remedy on their regular cat treats or food, as needed. Because Rescue Remedy is plant-based, be careful to monitor your cat after giving it or if allergy testing came back with any items on the ingredient list that they are allergic to.

  • Provide probiotics such as Purina Pro Plan Veterinary Supplements Calming Care Feline Formula.

  • Plug in Feliway pheromone diffusers throughout your home

    NOTE: There are some people who think that this type of diffuser aggravated their cat's asthma. We spoke with a veterinarian at CEVA, the manufacturer, who assured us that those reported cases had other triggers causing the attack, and they felt very comfortable recommending it for cats with asthma. But just to be safe, monitor your cat closely when first using. Pheromones have great calming effects, so it could be worth a try for your cat.

  • Provide enrichment such as food puzzles or toys

cat playing with ball toy canva

  • Provide interactive play with a wand toy to simulate predator/prey interaction. Our article about different types of cat toys, explains how to complete their natural prey sequence to satisfy your kitty.

  • There are prescription calming diets your veterinarian can recommend as long as your cat doesn't have food allergies.

  • Provide a hide-away place where your cat can feel safe. If you have a lot of boxes, we have just the cat condo you can make!

  • Provide a variety of vertical/ perch spaces.

  • Be sure to resolve any issues with other pets in the home that may be causing stress.

  • Keep the general environment of your household calm.

Weight, Arthritis, and Cat Asthma

Another reason to keep your cat active, besides to help lessen stress, is to help control their weight. The severity of asthma can be worse if your cat is overweight. In addition to the excess weight making breathing more difficult and increasing stress on the heart, the chronic inflammation it creates in the body can cause arthritis and weaken your cat's immune system.

If you are unsure of your cat's ideal body weight or how to help them lose weight, speak with their veterinarian. We have some tips on helping your cat lose weight, and how much to feed your cat.

Chronic discomfort or pain from arthritis can be a significant source of stress for your cat, too. A weakened immune system makes them more susceptible to infections which can trigger asthma attacks.

brushing cat teeth for good health

Preventing dental disease is important for all cats but especially those with asthma. Dental disease increases the chance of serious secondary bacterial infections when the bacteria move from the mouth into the lungs. Be sure your cat gets routine oral exams by their veterinarian and establish an at-home dental care routine that includes brushing their teeth, dental chews, oral rinses, etc.

Cat Litter and Asthma

There are dust-free and low-dust litter options that are better for cats (and people) with asthma.

Litter can affect your cat because the dust from typical clay and other dusty litters can lead to irritation of the airway, triggering an asthma attack. Below are several litters that have been known to work best for most cats with asthma.

If you, your cat, or someone else in your household has asthma or FAB, I'd suggest discussing these litters with your veterinarian and seeing if they might be right for your situation.

Dr. Elsey's Respiratory Relief Cat Litter
Dr. Elseys Respiratory Relief Cat Litter

Boxiecat All Natural Scent Free Clumping Cat Litter
Boxiecat All Natural Scent Free Clumping Cat Litter

ökocat Dust-Free Natural Paper Non-Clumping Pellets with Odor Control

Feline Pine Original Cat Litter
Yesterdays News Unscented Paper Cat Litter

CatSpot Litter: Coconut Cat Litter, All-Natural, and Dust-Free
Yesterdays News Unscented Paper Cat Litter


cat with asthma in uncovered litter box

Cat Urine Can Affect Your Cat's Asthma

Ammonia is a potent respiratory irritant that is in all cat urine. It can be an irritant to cats and their people. So, for this reason, for cats with FAB or those suffering from any respiratory issues, it’s always best to go with an uncovered litter box, as the covered varieties can trap the ammonia inside.


About the author

Profile picture for Dr. Beth Turner

Dr. Beth Turner

Beth Turner is a veterinarian with over 20 years of experience. She graduated from North Carolina State College of Veterinary Medicine and following graduation, she began her career as an associate veterinarian and worked closely with the local shelter.

In 2007 she accomplished her dream of practice ownership, designing and building her own clinic. Another meaningful role, while running her clinic, was serving as her county's shelter veterinarian. This gave her the opportunity to help improve the lives of many animals in her community as well as work with the rescue she loved. She sold her practice in 2019 to move across the country.

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